Douchi
Douchi (Chinese: 豆豉; pinyin: dòuchǐ), also known as tochi, fermented black soybeans, Chinese fermented black beans (Chinese: 黑豆豆豉; pinyin: hēidòu dòuchǐ; Jyutping: haak1dau2 dau6si6), or salted black beans, is a type of fermented and salted black soybean most popular in the cuisine of China, where they are most widely used for making black bean sauce dishes. Douchi is made by natural fermentation and salting of black soybeans.